Method and system for selecting vehicle performance

ABSTRACT

Methods and systems for selecting vehicle operating modes in response to output of remote security token devices are described. In one example, a vehicle operating mode may be determined when two key fobs having different, but valid, security token assignments are present within a vehicle cabin. Further, one mode of a two mode key fob may be selectively deactivated and reactivated to provide system flexibility.

CROSS REFERENCE TO RELATED APPLICATION

The present application is a continuation of U.S. patent applicationSer. No. 14/245,924, entitled “METHOD AND SYSTEM FOR SELECTING VEHICLEPERFORMANCE,” filed on Apr. 4, 2014, the entire contents of which arehereby incorporated by reference for all purposes.

FIELD

The present description relates to methods and systems for selectinglevels of vehicle performance. The methods and systems may beparticularly useful for limiting vehicle performance when the vehicle'sowner desires to restrict vehicle performance for other drivers.

BACKGROUND AND SUMMARY

A vehicle may be designed to provide a driver with a high level ofperformance. The high level of performance may be achieved byturbocharging the engine, supercharging the engine, or selecting camsand other components that may provide efficient air induction. Onoccasion, the vehicle's owner may wish to loan out the vehicle and limitthe vehicle's performance. One way of limiting performance for a loanedout vehicle is to provide different keys for different levels of desiredvehicle performance. For example, a first key may be provided for astandard or lower level of vehicle performance. The first key mayinclude a first set of engine and/or transmission control parametersthat limit vehicle performance, or the first key may transmit a codethat instructs an engine controller to select the first set of engineand/or transmission control parameters with which to operate thevehicle. A second key, similar to the first key, may transmit a set ofhigher performance level (e.g., race track performance) controlparameters or a code that instructs the engine controller to select thesecond set of engine and/or transmission control parameters with whichto operate the vehicle in a higher performance mode.

Some vehicle manufacturers have designed alternative ways to start avehicle that do not require a key with a blade that is inserted intokeyway of a lock. Rather, the key and blade are replaced by a bladelesskey fob. The key fob may be detected upon the key fob entering avehicle's cabin where signals may be transmitted between the key fob andan engine or vehicle controller. If a first key fob is programmed toprovide an indication for operating the vehicle with a standard or lowerlevel of vehicle performance and a second key fob is programmed toprovide an indication for operating the vehicle with a higher level ofperformance, the engine or vehicle controller may not be able to decidewhether to operate in the standard performance mode or higherperformance mode when both the first and second key fob are within thevehicle's passenger cabin.

The inventors herein have recognized the above-mentioned disadvantagesand have developed a method for selecting vehicle performance,comprising: selecting a first vehicle performance level and operating avehicle at the first vehicle performance level in response to a key fobbeing within a vehicle cabin and outside of a key fob holder; andselecting a second vehicle performance level and operating the vehiclein at the second vehicle performance level in response to a key fobbeing within the key fob holder.

By only selecting a higher vehicle performance level in response to akey fob being placed into a key fob holder, a vehicle controller mayreserve a higher level of vehicle performance based on a qualified keyfob being placed in a key holder. Otherwise, the controller may defaultto a lower level of vehicle performance when one or more key fobs arewithin a vehicle cabin, but not in the key fob holder. In this way, adriver may positively select a vehicle's performance mode based onwhether or not the driver chooses to place a high performance qualifiedkey fob (e.g., key fob that carries or broadcasts a token to permit thehigher level of vehicle performance) that has been assigned to thevehicle in the vehicle's key fob holder. The standard level of vehicleperformance may be provided when the qualified key fob or a key fobassigned to the vehicle but not qualified to enable the higher vehicleperformance level are outside of the key fob holder.

The present description may provide several advantages. Specifically,the approach may allow a vehicle owner to selectively provideauthorization to enable a higher level of performance in a vehicle.Additionally, the approach may avoid confusion between selectingdifferent vehicle operating modes when key fobs programmed to authorizedifferent levels of vehicle performance are simultaneously present in avehicle's cabin. Further, the approach provides a definitive way forselecting a higher vehicle performance level.

The above advantages and other advantages, and features of the presentdescription will be readily apparent from the following DetailedDescription when taken alone or in connection with the accompanyingdrawings.

It should be understood that the summary above is provided to introducein simplified form a selection of concepts that are further described inthe detailed description. It is not meant to identify key or essentialfeatures of the claimed subject matter, the scope of which is defineduniquely by the claims that follow the detailed description.Furthermore, the claimed subject matter is not limited toimplementations that solve any disadvantages noted above or in any partof this disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

The advantages described herein will be more fully understood by readingan example of an embodiment, referred to herein as the DetailedDescription, when taken alone or with reference to the drawings, where:

FIG. 1 is a schematic diagram of an engine;

FIG. 2 is a schematic diagram of a vehicle;

FIG. 3 shows examples sequences for selecting vehicle performance modes;

FIG. 4 shows a method for selecting a vehicle performance level;

FIG. 5 shows a continuation of the method of FIG. 4; and

FIG. 6 shows an example key fob.

DETAILED DESCRIPTION

The present description is related to selecting a vehicle performancelevel. A vehicle may be operated at one or more performance levels, oneperformance mode at a time. For example, a vehicle may be operated at astandard or lower performance level by operating the vehicle's engineand/or transmission based on a first group of vehicle controlparameters. The same vehicle may be operated at a higher performancelevel by operating the vehicle's engine and/or transmission based on asecond group of vehicle control parameters. FIG. 1 shows an exampleengine that may be operated with different sets or groups of controlparameters. The engine of FIG. 1 may be included in a vehicle as shownin FIG. 2. The vehicle performance level may be selected as shown in thesequence of FIG. 3. The vehicle performance level may be selected basedon the method of FIGS. 4 and 5. A vehicle's performance level may beselected according to a security token (e.g., a sequence of numbers formatching to a unique vehicle security clearance sequence) provided via akey fob as shown in FIG. 6.

Referring to FIG. 1, internal combustion engine 10, comprising aplurality of cylinders, one cylinder of which is shown in FIG. 1, iscontrolled by electronic engine controller 12. Engine 10 includescombustion chamber 30 and cylinder walls 32 with piston 36 positionedtherein and connected to crankshaft 40.

Flywheel 97 and ring gear 99 are coupled to crankshaft 40. Starter 96includes pinion shaft 98 and pinion gear 95. Pinion shaft 98 mayselectively advance pinion gear 95 to engage ring gear 99. Starter 96may be directly mounted to the front of the engine or the rear of theengine. In some examples, starter 96 may selectively supply torque tocrankshaft 40 via a belt or chain. In one example, starter 96 is in abase state when not engaged to the engine crankshaft. Combustion chamber30 is shown communicating with intake manifold 44 and exhaust manifold48 via respective intake valve 52 and exhaust valve 54. Each intake andexhaust valve may be operated by an intake cam 51 and an exhaust cam 53.The position of intake cam 51 may be determined by intake cam sensor 55.The position of exhaust cam 53 may be determined by exhaust cam sensor57. Intake cam 51 and exhaust cam 53 may be moved relative to crankshaft40 via valve adjusting mechanisms 71 and 73. Valve adjusting mechanisms71 and 73 may also deactivate intake and/or exhaust valves in closedpositions so that intake valve 52 and exhaust valve 54 remain closedduring a cylinder cycle.

Engine starter 96 may be selectively engaged in response to a driveractivating pushbutton 122, a key switch, or other actuator. Pushbutton122 is located in a vehicle's passenger cabin 11 along with user inputdisplay 124, transmitter/receiver 127, and key fob holder 129. A drivermay carry first key fob 123 and/or second key fob 125 into cabin 11. Keyfobs 123 and 125 may broadcast and receive data fromtransmitter/receiver 127. A more detailed sketch of key fobs 123 and 125is provided in FIG. 6. Key fob holder 129 may supply an electrical fieldto supply power to key fob 125 if a battery (not shown) within key fob125 is at a low energy storage level. Key fob holder 129 may alsoprovide a communication link between key fob 125 and controller 12 ifthe battery within key fob 125 is at a low energy storage level. Key fobholder may be shaped to be in mating engagement with the Key fob whenthe Key fob is held by the Key fob holder, as shown in FIG. 1. Asdescribed herein whether or not the controller determines if the Key fobis outside of, or within, a key fob holder may be based on variouscommunications between the two and/or based on physical contact or aphysical connection between the two. In one example, only in thesituation of physical contact between the key fob and the holder (e.g.,when the key fob is matingly positioned and held by the holder withoutany other mechanism holding the key fob), may selected vehicleoperations be enabled.

Fuel injector 66 is shown positioned to inject fuel directly intocylinder 30, which is known to those skilled in the art as directinjection. Alternatively, fuel may be injected to an intake port, whichis known to those skilled in the art as port injection. Fuel injector 66delivers liquid fuel in proportion to the pulse width of signal fromcontroller 12. Fuel is delivered to fuel injector 66 by a fuel system(not shown) including a fuel tank, fuel pump, and fuel rail (not shown).In one example, a high pressure, dual stage, fuel system may be used togenerate higher fuel pressures. In addition, intake manifold 44 is showncommunicating with optional electronic throttle 62 which adjusts aposition of throttle plate 64 to control air flow from air intake 42 tointake manifold 44. In some examples, throttle 62 and throttle plate 64may be positioned between intake valve 52 and intake manifold 44 suchthat throttle 62 is a port throttle.

Distributorless ignition system 88 provides an ignition spark tocombustion chamber 30 via spark plug 92 in response to controller 12.Universal Exhaust Gas Oxygen (UEGO) sensor 132 s shown coupled toexhaust manifold 48 upstream of catalytic converter 70. Alternatively, atwo-state exhaust gas oxygen sensor may be substituted for UEGO sensor126.

Converter 70 can include multiple catalyst bricks, in one example. Inanother example, multiple emission control devices, each with multiplebricks, can be used. Converter 70 can be a three-way type catalyst inone example.

Controller 12 is shown in FIG. 1 as a conventional microcomputerincluding: microprocessor unit 102, input/output ports 104, read-onlymemory 106 (e.g., non-transitory memory), random access memory 108, keepalive memory 110, and a conventional data bus. Controller 12 is shownreceiving various signals from sensors coupled to engine 10, in additionto those signals previously discussed, including: engine coolanttemperature (ECT) from temperature sensor 112 coupled to cooling sleeve114; a position sensor 134 coupled to an accelerator pedal 130 forsensing force applied by driver 132; a measurement of engine manifoldpressure (MAP) from pressure sensor 115 coupled to intake manifold 44;an engine position sensor from a Hall effect sensor 118 sensingcrankshaft 40 position; a measurement of air mass entering the enginefrom sensor 117; brake pedal position from brake pedal position sensor154 when driver 132 applies brake pedal 150; and a measurement ofthrottle position from sensor 58. Barometric pressure may also be sensed(sensor not shown) for processing by controller 12. In a preferredaspect of the present description, engine position sensor 118 produces apredetermined number of equally spaced pulses every revolution of thecrankshaft from which engine speed (RPM) can be determined.

During operation, each cylinder within engine 10 typically undergoes afour stroke cycle: the cycle includes the intake stroke, compressionstroke, expansion stroke, and exhaust stroke. During the intake stroke,generally, the exhaust valve 54 closes and intake valve 52 opens. Air isintroduced into combustion chamber 30 via intake manifold 44, and piston36 moves to the bottom of the cylinder so as to increase the volumewithin combustion chamber 30. The position at which piston 36 is nearthe bottom of the cylinder and at the end of its stroke (e.g. whencombustion chamber 30 is at its largest volume) is typically referred toby those of skill in the art as bottom dead center (BDC). During thecompression stroke, intake valve 52 and exhaust valve 54 are closed.Piston 36 moves toward the cylinder head so as to compress the airwithin combustion chamber 30. The point at which piston 36 is at the endof its stroke and closest to the cylinder head (e.g. when combustionchamber 30 is at its smallest volume) is typically referred to by thoseof skill in the art as top dead center (TDC). In a process hereinafterreferred to as injection, fuel is introduced into the combustionchamber. In a process hereinafter referred to as ignition, the injectedfuel is ignited by known ignition means such as spark plug 92, resultingin combustion. During the expansion stroke, the expanding gases pushpiston 36 back to BDC. Crankshaft 40 converts piston movement into arotational torque of the rotary shaft. Finally, during the exhauststroke, the exhaust valve 54 opens to release the combusted air-fuelmixture to exhaust manifold 48 and the piston returns to TDC. Note thatthe above is shown merely as an example, and that intake and exhaustvalve opening and/or closing timings may vary, such as to providepositive or negative valve overlap, late intake valve closing, orvarious other examples.

Referring to FIG. 2 a vehicle 2 including an engine 10, an electricalmachine 14, and an electrical energy storage device 13 is shown. Vehicle2 also includes a passenger cabin 11.

In one example, the vehicle may be propelled solely via the engine 10,solely via an electrical machine 14, or by both the engine 10 and theelectrical machine 14. In some example, the only source of propulsion iselectric machine 14. The electrical machine 14 may be suppliedelectrical power via the electrical energy storage device 13. Theelectrical energy storage device 13 may be recharged via the vehicle'skinetic energy or via engine 10 providing power to electrical machine14. The electric machine 14 may convert the vehicle's kinetic energy orengine torque into electrical energy which is stored in electric energystorage device 13. Electrical energy storage device 13 may also berecharged from a stationary power grid via a home charging system or aremote charging system (e.g., a charging station). In one example,electrical energy storage device 13 is a battery. Alternatively,electrical energy storage device 13 may be a capacitor or other storagedevice. Torque provided to vehicle wheels by the engine, motor, orengine and motor is based on a driver torque demand input via theaccelerator pedal 130.

Vehicle 2 is shown with internal combustion engine 10, and it may beselectively coupled to an electric machine 14. Internal combustionengine 10 may combust petrol, diesel, alcohol, hydrogen, or acombination of fuels.

Thus, the system of FIGS. 1 and 2 provides for a vehicle performancecontrol system, comprising: a first vehicle performance selecting devicefor solely activating a first vehicle operating performance level; asecond vehicle performance selecting device for activating the firstvehicle operating performance level or a second vehicle operatingperformance level; and a controller including executable instructions tooperate a vehicle in the first vehicle operating performance level orthe second vehicle operating performance level depending on a positionof the second vehicle performance selecting device within a vehiclecabin. The vehicle performance control system includes where the firstvehicle operating performance level is a lower vehicle performance levelthan the second vehicle operating performance level, and where thevehicle is operated when in the first vehicle operating performancelevel and the second vehicle operating performance level. The vehicleperformance control system includes where the second vehicle performanceselecting device includes one or more switches for deactivating thesecond vehicle performance level.

In some examples, the vehicle performance control system includes wherethe second vehicle performance selecting device includes circuitry todeactivate the second vehicle performance level for a predeterminedamount of time. The vehicle performance control system includes wherethe second vehicle performance selecting device include circuitry forautomatically reactivating the second vehicle performance level afterthe predetermined amount of time. The vehicle performance control systemfurther comprises additional instructions to operate the vehicle in thefirst vehicle operating performance level in response to the firstvehicle performance selecting device being within the vehicle cabin.

Referring now to FIG. 3, a plot of an example sequence for selectingvehicle performance modes is shown. The sequence of FIG. 3 may beprovided by the system of FIGS. 1 and 2 according to the method of FIGS.4 and 5. Vertical lines T0-T7 represents times of interest during thesequence.

The first plot from the top of FIG. 3 is a plot of key fob #1 stateversus time. The states of key fob #1 may be outside the vehicle cabin(OUTSIDE), inside the vehicle (IN VEHICLE), and within the key fobholder (IN HOLDER). The states of key fob #1 are based on placement ofkey fob #1 by the key fob user (e.g., a person). The Y axis representskey fob #1 state and each state is indicated along the Y axis. The Xaxis represents time and time increases from the right side of FIG. 3 tothe left side of FIG. 3. In this example, key fob #1 is programmed toenable high performance mode when key fob #1 is installed in the key fobholder and to enable standard performance mode when key fob #1 is notinstalled in the key fob holder.

The second plot from the top of FIG. 3 is a plot of key fob #2 stateversus time. The states of key fob #2 may be outside the vehicle cabin(OUTSIDE), inside the vehicle (IN VEHICLE), and within the key fobholder (IN HOLDER). The states of key fob #2 are based on placement ofkey fob #2 by the key fob user (e.g., a person). The Y axis representskey fob #2 state and each state is indicated along the Y axis. The Xaxis represents time and time increases from the right side of FIG. 3 tothe left side of FIG. 3. In this example, key fob #2 is not programmedto enable high performance mode when key fob #2 is installed in the keyfob holder and to enable standard performance mode when key fob #2 isnot installed in the key fob holder. Key fob #2 enables standardperformance mode when key fob #2 is installed in the key fob holder.

The third plot from the top of FIG. 3 is a plot of vehicle performancemode versus time. The vehicle may be in standard performance mode orhigh performance mode. The vehicle is in standard performance mode whenthe trace is near the X axis. The vehicle is in the high performancemode when the trace is near the Y axis arrow. The X axis represents timeand time increases from the right side of FIG. 3 to the left side ofFIG. 3.

The fourth plot from the top of FIG. 3 is a plot of the start pushbuttonstate (e.g., 122 of FIG. 1) versus time. The start pushbutton may beapplied or not applied. The driver requests a vehicle start when thestart pushbutton is applied. The start pushbutton state is not appliedwhen the trace is near the X axis. The start pushbutton state is appliedwhen the trace is near the Y axis arrow. The X axis represents time andtime increases from the right side of FIG. 3 to the left side of FIG. 3.

The fifth plot from the top of FIG. 3 is a plot of detected key fobstate. Each of key fobs #1 and #2 states may be outside the vehiclecabin (OUTSIDE), inside the vehicle (IN VEHICLE), and within the key fobholder (IN HOLDER). The states of key fobs #1 and #2 are based detectionof the fobs within the passenger cabin. The state of key fob #1 isrepresented by solid line 302 and the state of key fob #2 is representedby dashed line 304. Key fobs #1 and #2 are in the same state when onlysolid line 302 is visible. A key fob may be detected when the key fob isa key fob that broadcasts a signal that is verified to have authority toallow operation of the vehicle. In this example, both key fob #1 and keyfob #2 possess a token (e.g. encoded signal) that allows activation ofthe vehicle. The X axis represents time and time increases from theright side of FIG. 3 to the left side of FIG. 3.

The sixth plot from the top of FIG. 3 is a plot of the vehicle operatingstate versus time. The vehicle state may be off or activated. Thevehicle is off when the trace is near the X axis. The vehicle is activewhen the trace is near the Y axis arrow. The vehicle's engine and/ormotor may be activated when the vehicle is activated. The X axisrepresents time and time increases from the right side of FIG. 3 to theleft side of FIG. 3.

At time T0, the engine is not running as indicated by the engine statetrace being near the X axis. Further, key fobs #1 and #2 are outside thevehicle and are not detected. The vehicle is in default standard mode(e.g., lower performance mode) and the start pushbutton is not applied.

Between time T0 and time T1, both key fob #1 and #2 enter the vehicle'scabin. Further, both key fobs are detected in the passenger cabin andthe vehicle remains in standard performance mode. The driver has notattempted to start the vehicle via the pushbutton and the vehicle is instandard performance mode.

It should be noted that the driver requests vehicle operation viaapplying the start push button. A request for vehicle operation mayinclude starting an internal combustion engine, activating a motor, orstarting an engine and activating a motor.

At time T1, the driver applies the start pushbutton to request vehicleoperation. Since both key fob #1 and key fob #2 are within the vehiclecabin and authorized to activate the vehicle, the vehicle enters runmode where engine or motor torque may be applied to vehicle wheels.Engine or motor torque may not be applied to vehicle wheels when thevehicle is not activated. The start pushbutton is released shortly aftertime T1.

Between time T1 and time T2, the vehicle is in run state or mode andoperating in standard performance mode. In standard performance mode,less torque may be applied to vehicle wheels as compared to when thevehicle is operated in high performance mode. Further, vehicle speed,rate of wheel torque change, engine torque change, and motor torquechange may be limited. Shortly before time T2, the both key fob #1 andkey fob #2 exit the vehicle in response to the driver and/or passengerleaving the passenger cabin. The detected fob state for both fob #1 andfob #2 also indicate no fobs present.

At time T2, the vehicle enters an off state in response to key fob #1and key fob #2 not being in the vehicle cabin. In some examples, thedriver may apply the start engine pushbutton to stop the engine. Thevehicle remains in an off state until time T3. Shortly before time T3,both key fob #1 and key fob #2 enter the vehicle cabin and key fob #1 isplaced in the key fob holder. Both key fob #1 and key fob #2 aredetected in the cabin and key fob #1 is detected in the key fob holder.

At time T3, the driver applies the start pushbutton and the pushbuttonstate changes from not applied to applied. The vehicle enters run stateand the vehicle is transitioned to a higher performance state asindicated by the vehicle mode trace transitioning to a higher level inresponse to key fob #1 being in the key fob holder and the startpushbutton being applied. Shortly thereafter, the start pushbutton isnot applied and the vehicle continues to operate in the high performancemode. Each of key fob #1 and key fob #2 remain in their respectivepositions until shortly before time T4.

At time T4, the vehicle enters an off state in response to key fob #1and key fob #2 not being in the vehicle cabin. The vehicle defaults backto standard performance mode in response to key fob #1 leaving the keyfob holder. The vehicle remains in an off state until time T5. Shortlybefore time T5, both key fob #1 and key fob #2 enter the vehicle cabinand key fob #2 is placed in the key fob holder. Both key fob #1 and keyfob #2 are detected in the cabin and key fob #2 is detected in the keyfob holder.

At time T5, the driver applies the start pushbutton and the pushbuttonstate changes from not applied to applied. The vehicle enters run stateand the vehicle remains in the standard performance mode as indicated bythe vehicle mode trace staying near the X axis. The vehicle remains inthe standard performance mode in response to key fob #1 being outsidethe key fob holder and the start pushbutton being applied. Since key fob#2 is not programmed to allow activation of the high performance mode,the vehicle is activated in the lower performance mode. Each of key fob#1 and key fob #2 remain in their respective positions until shortlybefore time T6.

At time T6, the vehicle enters an off state in response to key fob #1and key fob #2 not being in the vehicle cabin. The vehicle stays in thestandard performance mode in response to key fob #1 leaving the key fobholder. The vehicle remains in an off state until time T7. Shortlybefore time T7, key fob #1 enters the vehicle cabin without key fob #2.Key fob #1 is detected in the cabin, not in the key fob holder.

At time T7, the driver applies the start pushbutton and the pushbuttonstate changes from not applied to applied. The vehicle enters run stateand the vehicle remains in the standard performance mode as indicated bythe vehicle mode trace staying near the X axis. The vehicle remains inthe standard performance mode in response to key fob #1 being outsidethe key fob holder and the start pushbutton being applied. Since key fob#2 is not in the vehicle it does not affect vehicle operation. Thedriver releases the pushbutton soon after time T7.

Thus, the vehicle may operate in a standard or high performance mode inresponse to locations of key fobs #1 and #2. Further, key fob #1 isprogrammed to allow a high performance mode or a standard performancemode base it its position in the vehicle cabin. In one example, key fob#1 and key fob #2 may be assigned to the vehicle and each key fob may beassigned a unique security token (e.g., a bit pattern or data sequence)so that a vehicle controller may determine which vehicle operation modeis authorized.

Referring now to FIGS. 4 and 5, a method for selecting vehicleperformance level is shown. The vehicle may include an internalcombustion engine, solely a motor, or a motor and an engine. The methodof FIGS. 4 and 5 may be included in the system of FIGS. 1 and 2.Further, the method may be stored in non-transitory memory as executableinstructions.

At 402, method 400 judges whether or not to configure a key fob. In oneexample, a key fob may include a micro controller, application specificintegrated circuit, or other circuitry to enable or disableauthorization of a high performance vehicle operating mode (e.g., atrack mode). In one example, method 400 may judge to allow configurationof a key fob in response to a person activating a predetermined sequenceof switches on a key fob. For example, configuration of a key fob maytake place in response to two key fob buttons being applied for apredetermined amount of time and then pressing key fob buttons in apredetermined order. If method 400 judges that the key fob is to beconfigured, the answer is yes and method 400 proceeds to 430. Otherwise,the answer is no and method 400 proceeds to 404.

At 430, method 400 judges whether or not the key fob is programmed forstandard and high performance vehicle operating modes. In some examples,a vehicle may be supplied with fobs that allow standard and highperformance modes as well as fobs that allow only standard operatingmode. The fobs that allow standard and high performance mode may haveadditional circuitry. In one example, a key fob that is programmed forstandard and high performance operating modes may have a security tokenthat is different from a key fob that is programmed for only standardvehicle operating mode. While both key fobs provide authorization (e.g.,via a broadcast RF signal) to a same vehicle they are assigned, thesequence or toke broadcast by each key fob may be different. However, ifthe high performance mode is temporarily deactivated (e.g., bydeactivating the high performance security token radio frequencybroadcast) in one key fob, both key fobs may transmit or broadcast thesame vehicle operation authorization sequence. If method 400 judges thatthe key fob is programmed for standard and high performance vehicleoperating modes, the answer is yes and method 400 proceeds to 432.Otherwise, the answer is no and method 400 proceeds to 404.

At 432, method 400 judges whether or not the person in possession of thekey fob is requesting to hold the key fob in a mode where only thestandard vehicle operating mode is permitted or authorized by the keyfob. The person may request the key fob be placed in a mode that onlyauthorizes the standard vehicle mode by performing a predetermined taskto authorize such mode. In one example, the person presses buttons onthe fob that act as switches in a predetermined order to request the keyfob operate to only allow the standard vehicle operating mode. If method400 judges that the key fob is requested to be held to only authorizingthe standard vehicle operating mode, the answer is yes and method 400proceeds to 434. Otherwise, the answer is no and method 400 proceeds to404.

At 434, method 400 determines the duration of time that the key fob isto lockout, or not authorize, the high performance vehicle operatingmode. Thus, the key fob only authorizes the standard vehicle operatingmode when high performance vehicle operating mode is locked out orprohibited via the key fob. In one example, the key fob onlyreauthorizes the high performance vehicle operating mode when a personoperates switches on the key fob in a predetermined sequence. In otherexamples, the person operating the key fob may apply one or moreswitches (e.g., pushbuttons) on the key fob to define a time durationthat authorization of high performance vehicle operation mode isdeactivated. In still other examples, the high performance vehicleoperation is not authorized via the key fob for a predetermined amountof time (e.g., 24 hours). Method 400 proceeds to 436 after the durationthe key fob is not allowed to authorize the high performance vehicleoperating mode is determined.

At 436, method 400 judges whether the high performance mode lockout istimed out. In other words, method 400 judges whether or not an amount oftime the key fob is not allowed to authorize high performance vehicleoperating mode has expired. If method 400 judges that the amount of timeto prohibit the key fob from authorizing the high performance vehicleoperating mode has not expired, the answer is no and method 400 proceedsto 438. Otherwise, method 400 proceeds to 444. The high performance modelockout may be timed out when a timer in a microcontroller exceeds athreshold value or reaches zero.

At 438, method 400 judges if the person in possession of the key fob hasinput a security sequence (e.g., predetermined order of key selection)into the key fob that allows the key fob to authorize high performancevehicle operating mode. If method 400 judges that a person has input thesecurity sequence, the answer is yes and method 400 proceeds to 444.Otherwise, the answer is no and method 400 proceeds to 440.

At 440, method 400 limits the key fob to authorize only standard vehicleperformance mode. In one example, the key fob transmits or broadcasts afirst sequence, a same sequence as another key fob having ability toauthorize only standard vehicle performance mode in its assigned vehicle(e.g., a vehicle with which the key fob is paired an programmed tooperate with), upon entry to a vehicle cabin. The first sequenceauthorizes the standard vehicle performance mode whether the key fob isin the passenger cabin or in the key fob holder in the passenger cabin.Method 400 proceeds to 404 after the first key fob sequence is permittedby the key fob.

At 444, method 400 allows the key fob to authorize the high performancevehicle operating mode. In one example, the key fob transmits orbroadcasts a second sequence upon entry to the vehicle cabin. The secondsequence authorizes the high performance vehicle operating mode in thevehicle to which the key fob is assigned when the key fob is installedin the key fob holder. The second sequence authorizes the standardvehicle performance mode when the key fob is in the passenger cabin, butnot in the key fob holder. Method 400 proceeds to 404 after the key fobis allowed to authorize the high performance vehicle operating mode.

At 404, method 400 judges whether or not a driver has requests vehicleoperation. In one example, the driver requests vehicle operation viapressing a start pushbutton. The start push button may activate a motoror an engine. If method 400 judges that a driver is requesting vehicleoperation, the answer is yes and method 400 proceeds to 406. Otherwise,the answer is no and method 400 proceeds to 450.

At 450, method 400 prohibits vehicle operation. Method 400 may prohibitvehicle operation via ceasing to supply fuel and spark to an engine.Alternatively, method 400 may cease current flow to a motor. Method 400proceeds to exit after vehicle operation is prohibited.

At 406, method 400 searches for one or more key fobs in the vehicle andthat are assigned to the vehicle. In one example, method 400 broadcastsa signal for key fobs within the vehicle's cabin and waits for one ormore key fobs to respond back with operation to start the vehicle andindicate the vehicle operating mode (e.g., standard or highperformance). Method 400 proceeds to 410 after searching for key fobs inthe vehicle cabin.

At 410, method 400 searches for a key fob in a key fob holder. In oneexample, the key fob holder includes a coil to provide an electric fieldat the key fob holder. A key fob in the key fob holder may be poweredvia the electric field. Further, a request for authorization to operatethe vehicle and select a vehicle operating mode may be broadcast to thekey fob via the electric field or a set of contacts. Method 400 proceedsto 412 after searching for a key fob in the key fob holder.

At 412, method 400 judges whether or not a valid or assigned key fob isin the vehicle cabin. In one example, method 400 judges whether or not avalid or assigned key fob is in the vehicle based on a sequencebroadcast by the key fob. The sequence may be broadcast via radiofrequency (RF) and the sequence may include encoded numbers and letters.If method 400 judges that a valid or assigned key fob is present in thevehicle cabin, the answer is yes and method 400 proceeds to 416.Otherwise, the answer is no and method 400 proceeds to 414.

At 414, method 400 judges whether or not a valid or assigned key fob isin the key fob holder. In one example, method 400 judges whether or nota valid or assigned key fob is in the key fob holder based on a sequencetransmitted by the key fob to the key fob holder. The sequence may betransmitted to the coil in the key fob holder or a set of contacts. Thesequence may include encoded numbers and letters. If method 400 judgesthat a valid key fob is present in key fob holder, the answer is yes andmethod 400 proceeds to 418. Otherwise, the answer is no and method 400proceeds to 450.

At 416, method 400 judges whether or not a valid or assigned key fob isin the key fob holder. The key fob may transmit a sequence to the coilin the key fob holder or a set of contacts. The sequence may includeencoded numbers and letters. If method 400 judges that a valid orassigned key fob is present in key fob holder, the answer is yes andmethod 400 proceeds to 418. Otherwise, the answer is no and method 400proceeds to 420.

At 418, method 400 judges whether or not the key fob in the key fobholder is programmed to authorize the higher performance vehicleoperating mode. In one example, a vehicle controller compares a sequencetransmitted by the key fob to a predetermined sequence stored in memory.If the two sequences are identical, the higher performance vehicleoperating mode is authorized by a qualified key fob. If the twosequences are not identical, the higher performance vehicle operatingmode is not authorized by the key fob. Method 400 proceeds to 422 if thehigher performance mode is authorized by the key fob. Otherwise, method400 proceeds to 420.

At 420, method 400 starts the vehicle in standard or lower performancemode. Lower performance mode may be facilitated by operating the engine,motor, and/or transmission with a first group of control parameters. Thecontrol parameters may include but are not limited to providing for alower current amount supplied to a motor, a reduction in boost for aturbocharged engine, shorter duration intake valve opening time for aninternal combustion engine, retarded spark timing for an internalcombustion engine, limited throttle opening amount for an internalcombustion engine, reduced fuel amount for an internal combustionengine, longer duration transmission shift times, reduced maximumvehicle speed, reduced maximum wheel torque, and/or other controlparameters that limit vehicle performance as compared to the vehiclecontrol parameters when the engine is operated in the higher performancemode. For example, a maximum wheel torque in the standard vehicleperformance mode is less than a maximum wheel torque in the highervehicle performance mode. In another example, a maximum vehicle speed inthe standard vehicle performance mode is less than a maximum vehiclespeed in the higher vehicle performance mode. Method 400 proceeds toexit after the engine begins to operate according to the first group ofcontrol parameters that deliver lower vehicle performance as compared tooperating the vehicle using the second group of parameters in the higherperformance mode.

At 422, method 400 starts the vehicle in the higher performance mode.Higher performance mode may be facilitated by operating the engine,motor, and/or transmission with a second group of control parameters.The second group of control parameters may provide for a higher currentamount supplied to a motor, an increase in boost for a turbochargedengine, longer duration intake valve opening time for an internalcombustion engine, advanced spark timing for an internal combustionengine, allowance for a wide open throttle opening amount for aninternal combustion engine, increased fuel amount for an internalcombustion engine, shorter duration transmission shift times, and/orother control parameters that increase vehicle performance as comparedto the vehicle control parameters when the engine is operated in thestandard performance mode. Method 400 proceeds to exit after the enginebegins to operate according to the second group of control parametersthat deliver higher vehicle performance as compared to the operating thevehicle using the first group of parameters in the lower performancemode.

In this way, one or more remote signaling key fobs that are programmedto allow operation of the same vehicle, but at different performancelevels, may be present in the vehicle's passenger cabin without creatingoperating priority issues. Further, a way of ensuring a repeatablepriority between the two key fobs and the two vehicle performance levelsis established.

Thus, the method of FIG. 4 provides for selecting vehicle performance,comprising: selecting a first vehicle performance level and operating avehicle at the first vehicle performance level in response to a key fobbeing within a vehicle cabin and outside of a key fob holder; andselecting a second vehicle performance level and operating the vehiclein at the second vehicle performance level in response to a key fobbeing within the key fob holder. The method includes where the firstvehicle performance level is based on a first group of vehicle controlparameters and where the second vehicle performance level is based on asecond group of vehicle control parameters. The method includes wherethe key fob transmits a security token to a vehicle controller.

In some examples, the method further comprises selecting the firstvehicle performance level and operating the vehicle at the firstperformance level in response to the key fob being within the key fobholder and the second vehicle performance level being locked out orprohibited via the key fob. The method of claim 4, where the secondvehicle performance level is locked out via operating one or moreswitches on the key fob. The method further comprises ceasing to lockout the second vehicle performance level in response to operating theone or more switches on the key fob. The method further comprisesceasing to lock out the second vehicle performance level in response toa signal from a vehicle controller.

The method of FIG. 4 also provides for selecting vehicle performance,comprising: selecting a first vehicle performance level in response to afirst key fob assigned a first vehicle performance level and a secondkey fob assigned a second vehicle performance level different than thefirst vehicle performance level being within a vehicle cabin and outsideof a key fob holder, the first and second key fobs having securitytokens assigned to a same vehicle; selecting a second vehicleperformance level, and not the first vehicle performance level, onlywhen the second key fob in within the key fob holder; and operating thesame vehicle according to the first or second vehicle performance level.

In one example, the method includes where the first vehicle performancelevel is based on a first group of vehicle control parameters and wherethe second vehicle performance level is based on a second group ofvehicle control parameters. The method also includes where the firstvehicle performance level is selected before an engine is started. Themethod includes where the first key fob has a first security token andwhere the second key fob has a second security token. The method furthercomprises not selecting the second vehicle performance level andselecting the first vehicle performance level when the second key fob isin the key fob holder in response to deactivating the second vehicleperformance mode via one or more switches of the second key fob. Themethod further comprises reactivating the second vehicle performancemode via the one or more switches of the second key fob. The methodfurther comprises selecting the first vehicle performance level inresponse to only the first key fob being within the vehicle cabin.

Referring now to FIG. 6, a schematic of an example key fob is shown. Keyfob 125 does not include a key blade or other apparatus forcommunicating with a key way of a lock. Instead, key fob 125 maytransmit a radio frequency signal upon receiving a broadcast commandfrom a vehicle or engine controller within a vehicle's passenger cabin.

In this example, key fob 125 includes pushbutton switches 606, 608, 610,and 612. However, in other examples, key fob 125 may include a differentnumber of switches and the switches may perform different operations.Pushbuttons 606, 608, 610, and 612 provide input to application specificintegrated circuit or microcontroller 620, and microcontroller 620broadcasts security tokens (e.g., data sequences) to the vehiclecontroller.

In a first mode, applying pushbutton switch 606 causes key fob 125 totransmit a signal to the vehicle controller to unlock vehicle doors.Further, applying pushbutton switch 608 causes key fob 125 to transmit asignal to the vehicle controller to lock vehicle doors. Further still,applying pushbutton switch 610 causes key fob 125 to transmit a signalto the vehicle controller to sound the vehicle's horn. Finally, applyingpushbutton switch 612 causes key fob 125 to transmit a signal to thevehicle controller to open the vehicle's trunk.

Pushbutton switches may also operate in a second mode to allow the keyfob holder to define which vehicle performance operating modes may beactivated via the key fob. For example, pushbutton switches 606 and 608may be simultaneously applied for a predetermined amount of time toenter key fob programming mode. LED lights 602 and 604 may illuminate ina predetermined sequence when key fob 125 is in programming mode. Oncein programming mode pushbutton 610 may be applied and released a desirednumber of times to indicate a number of hours the second higherperformance vehicle operating mode is not to be transmitted by key fob125. Pushbutton 612 may be applied to cancel high vehicle performancemode lockout so that the higher vehicle performance mode is reactivated.In this way, key fob may inhibit or lock out the higher vehicleperformance mode by not transmitting the higher performance modesequence while still transmitting the standard performance modesequence. The vehicle may operate in the higher performance operatingmode when key fob 125 transmits the higher performance operating modesequence from the key fob holder in the vehicle's passenger cabin.

Key fobs that only allow the standard vehicle performance mode may looklike key fob 125, but such key fobs may not include LEDs 602 and 604since no programming mode is available in these key fobs. Further, insome examples, key fob 125 may be programmed via a display panel whileinstalled in the key fob holder. For example, the person in possessionof the key fob installs the key fob in the key fob holder and instructsthe key fob to not broadcast a signal to allow the vehicle to operate inthe higher performance mode for a predetermined amount of time. Once thepredetermined amount of time expires, the key fob may once againtransmit the signal that allows the higher performance vehicle operatingmode. Thus, one single key fob may act to allow or prohibit entry intothe higher performance vehicle operating mode.

As will be appreciated by one of ordinary skill in the art, methodsdescribed in FIG. 4 may represent one or more of any number ofprocessing strategies such as event-driven, interrupt-driven,multi-tasking, multi-threading, and the like. As such, various steps orfunctions illustrated may be performed in the sequence illustrated, inparallel, or in some cases omitted. Likewise, the order of processing isnot necessarily required to achieve the objects, features, andadvantages described herein, but is provided for ease of illustrationand description. Although not explicitly illustrated, one of ordinaryskill in the art will recognize that one or more of the illustratedsteps or functions may be repeatedly performed depending on theparticular strategy being used.

This concludes the description. The reading of it by those skilled inthe art would bring to mind many alterations and modifications withoutdeparting from the spirit and the scope of the description. For example,vehicles including electric, hybrid, or internal combustion enginepropulsion systems could use the present description to advantage.

The invention claimed is:
 1. A method for selecting vehicle performance,comprising: selecting a vehicle performance level via one or moreswitches located on a key fob; and locking out a second vehicleperformance level in response to selecting the vehicle performancelevel.
 2. The method of claim 1, where a first vehicle performance levelis active when the second vehicle performance level is locked out. 3.The method of claim 2, where the second vehicle performance level is ahigher performance level than the first vehicle performance level. 4.The method of claim 3, where the second vehicle performance level islocked out for a predetermined amount of time.
 5. The method of claim 3,where the second vehicle performance level is locked out until switcheson the key fob are operated in a predetermined sequence.
 6. The methodof claim 3, where the second vehicle performance level is locked out fora time duration defined via one or more switches on the key fob.
 7. Themethod of claim 1, further comprising activating the second vehicleperformance level in response to a predetermined order of selection ofkeys of the key fob.
 8. A method for selecting vehicle performance,comprising: activating operation of a vehicle at a first, lower vehicleperformance level in response to a key fob being within a vehicle cabinand outside of a key fob holder; and activating operation of the vehicleat a second, higher vehicle performance level in response to the key fobbeing within and in mating engagement with the key fob holder.
 9. Themethod of claim 8, where the key fob includes keys to activate anddeactivate the second vehicle performance level.
 10. The method of claim8, where the key fob includes a microcontroller for broadcasting asecurity token.
 11. The method of claim 8, where the second vehicleperformance level is based on a group of control parameters.
 12. Themethod of claim 11, where the group of control parameters provides forincreased boost.
 13. The method of claim 11, where the group of controlparameters provides for transmission shift times.
 14. A vehicleperformance control system, comprising: a key fob including switches forselecting vehicle performance levels; and a controller includingexecutable instructions stored in non-transitory memory to operate avehicle in a first or second vehicle operating performance leveldepending on whether the key fob is within a vehicle cabin and whetherthe key fob is matingly engaged with a key fob holder, the key fobholder located within the vehicle cabin.
 15. The vehicle performancecontrol system of claim 14, where the first vehicle operatingperformance level is a lower vehicle performance level than the secondvehicle operating performance level.
 16. The vehicle performance controlsystem of claim 14, where the controller includes control parametersrelated to the second vehicle operating performance level.
 17. Thevehicle performance control system of claim 14, where the switchesdeactivate the second vehicle performance level for a predeterminedamount of time.
 18. The vehicle performance control system of claim 17,where the key fob includes circuitry for automatically reactivating thesecond vehicle performance level after the predetermined amount of time.19. The vehicle performance control system of claim 14, furthercomprising a transmitter/receiver to communicate with the key fob.